Question

I have this:

public double[][] mRoute;

and I need to have it be Parcelable, but I am not certain of the best way to do this.

It appears that turning it into a List and then writing that isn’t the right approach.

UPDATE:

This is what compiled from @yuku’s answer.

    out.writeInt(mRoute.length); // store the length
    for (int i = 0; i < mRoute.length; i++) {
        out.writeInt(mRoute[i].length);
        out.writeDoubleArray(mRoute[i]);
    }
    mRoute = new double[in.readInt()][]; 
    for (int i = 0; i < mRoute.length; i++) {
         mRoute[i] = new double[in.readInt()];
         in.readDoubleArray(mRoute[i]);
    }

I haven’t tried it, just got it to compile, which is a start.

Answer 1

You can’t make a double[][] a Parcelable, but you can create a class that implements Parcelable and contains that double[][].

on writeToParcel(Parcel dest), do:

dest.writeInt(mRoute.length); // store the length
for (int i = 0; i < mRoute.length; i++) {
    dest.writeDoubleArray(mRoute[i]);
}

on readFromParcel(Parcel in), do:

mRoute = new double[][in.readInt()]; 
for (int i = 0; i < mRoute.length; i++) {
    mRoute[i] = in.readDoubleArray();
}